Bezzera BZ13 slow build up of brew pressure

#1: Post by **erwinseow** » September 14th, 2017, 1:55 am

Hi all,

Recently I am very some problem with my 2 year old BZ13.

Please watch this.

http://www.youtube.com/watch?v=UVyq7lwiIKk

The brew pressure build up is very slow. Any clues on what the problem is? Is it a dying pump?

Also in the past, after u press the button after the shot is pulled, the manometer needle will jump back to 0 almost immediately. But now it just moves back slowly.

Thanks in advance.

Erwin.

September 14th, 2017, 2:23 pm

It sounds like the pump is fine; it looks like the gauge is slow.

September 15th, 2017, 9:35 am

You are right. I just replaced the pump and the problem is still there.

What are the possible issues?

1) Faulty gauge?
2) Solenoid Valve?

advice needed!

Thanks!
Erwin

#4: Post by **DeGaulle** » September 15th, 2017, 10:39 am

My guess is it's the gauge. If your solenoid valve were sticky, I would still expect to see a instant drop to zero, albeit delayed. (Water is incompressible, so the pressure will instantly diminish even at a partly open exhaust port of the solenoid.)

September 15th, 2017, 11:25 am

Hi all,

Thanks for the suggestion.

If I were to take out the pressure gauge. Can I service it or do I need to replace it?

Thanks!

Erwin

#6: Post by **DeGaulle** » September 15th, 2017, 11:41 am

I am not sure what you could possibly do to service the gauge. It is basically a needle that moves with the compression force of a spring that balances the brew pressure. I would replace it.

#7: Post by **slipchuck** » September 15th, 2017, 11:57 am

erwinseow wrote:Hi all,

Recently I am very some problem with my 2 year old BZ13.

Please watch this.

http://www.youtube.com/watch?v=UVyq7lwiIKk

The brew pressure build up is very slow. Any clues on what the problem is? Is it a dying pump?

Also in the past, after u press the button after the shot is pulled, the manometer needle will jump back to 0 almost immediately. But now it just moves back slowly.

Thanks in advance.

Erwin.

Besides the gauge, how do you like your Bezzera?

September 15th, 2017, 6:36 pm

It rocks! Compact in size and warms up extremely fast. I had had it for 2 years+ and have pulled thousands of shots with it. I use it in an office environment and so far so good.

The only issue that I had so far was the joystick of the steamwand. The design is very simple made the parts worn out with high usage. So I replaced the worn parts. Quite easy if you are a hands on person.

Love it!

September 20th, 2017, 8:18 am

Hi all,

How do I know that this problem is not due to the OPV?

Thanks in advance!

Erwin

#10: Post by **DeGaulle** » September 20th, 2017, 3:31 pm

A sticky OPV due to some deposit is not an uncommon glitch, but it usually shows as pressure oscillations, not a slower ramp up or ramp down per se.